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  • Gypsy Moth
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    Gypsy Moth

    Author(s) R. Chris Williamson This fact sheet covers the highly destructive gypsy moth, detailing its life cycle, the destruction it causes, and t...

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  • Euonymus Caterpillar
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    Euonymus Caterpillar

    Author(s) K. A. Delahaut In Wisconsin, the euonymus caterpillar Yponomeuta cagnagella damages the spindletree euonymus, the winged euonymus (also ...

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  • Dutch Elm Disease in Wisconsin
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    Dutch Elm Disease in Wisconsin

    Author(s) M. F. Heimann, P. J. Pellitteri, E. B. Smalley, R. P. Guries Dutch elm disease is a fatal fungus disease attacking American elms. The fu...

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  • Deciduous Tree Disorder: Cankerworms
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    Deciduous Tree Disorder: Cankerworms

    Author(s) P. J. Pellitteri, D. L. Mahr, D. J. Hall Severe, early season defoliation of several hardwood species may be caused by spring or fall ca...

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  • Birch Leafminer
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    Birch Leafminer

    Author(s) P. J. Pellitter Birch leafminers are insects that can destroy the leaves of all ornamental birch varieties grown in Wisconsin. European,...

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  • Birch Disorder: Bronze Birch Borer
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    Birch Disorder: Bronze Birch Borer

    Author(s) R. C. Williamson, P. J. Pellitteri The bronze birch borer is a serious pest of birch trees in the Midwest. It can severely injure or kil...

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  • Ash Plant Bug
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    Ash Plant Bug

    Author(s) P. J. Pellitteri, C. F. Koval A small insect called the ash plant bug attacks ash trees in June and July, causing thin, discolored, spot...

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